EP2090809B1 - Procédé de commande et dispositif de commande d'un mécanisme d'inversion - Google Patents

Procédé de commande et dispositif de commande d'un mécanisme d'inversion Download PDF

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Publication number
EP2090809B1
EP2090809B1 EP20090151292 EP09151292A EP2090809B1 EP 2090809 B1 EP2090809 B1 EP 2090809B1 EP 20090151292 EP20090151292 EP 20090151292 EP 09151292 A EP09151292 A EP 09151292A EP 2090809 B1 EP2090809 B1 EP 2090809B1
Authority
EP
European Patent Office
Prior art keywords
shift cylinder
reverse gear
spring
gear unit
control device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP20090151292
Other languages
German (de)
English (en)
Other versions
EP2090809A2 (fr
EP2090809A3 (fr
Inventor
Robert Januschevski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP2090809A2 publication Critical patent/EP2090809A2/fr
Publication of EP2090809A3 publication Critical patent/EP2090809A3/fr
Application granted granted Critical
Publication of EP2090809B1 publication Critical patent/EP2090809B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/2807—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted using electric control signals for shift actuators, e.g. electro-hydraulic control therefor 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed- or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H2059/0295—Selector apparatus with mechanisms to return lever to neutral or datum position, e.g. by return springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe ; Circumventing or fixing failures
    • F16H2061/1232—Bringing the control into a predefined state, e.g. giving priority to particular actuators or gear ratios
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/16—Inhibiting  or initiating  shift during unfavourable conditions , e.g. preventing forward-reverse shift at high vehicle speed, preventing engine overspeed  
    • F16H2061/168—Forced shifts into neutral for safety reasons, e.g. in case of transmission failure or emergency braking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H3/14—Gearings for reversal only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms

Definitions

  • the present invention relates to a control method of a switchable reversing transmission of a vehicle, wherein the reversing gear is switched by means of a shift cylinder in the three shift positions forward, neutral and reverse and the shift cylinder to an electropneumatic and electromagnetic control device which additionally comprises at least two solenoid valves in a solenoid valve block, According to the preamble of claim 1.
  • the present invention relates to a control device of a switchable reverse gear of a vehicle, wherein the reverse gear is switchable by means of a shift cylinder in the three shift positions forward, neutral and reverse and the shift cylinder belongs to an electropneumatic and electromagnetic control device, which additionally comprises at least two solenoid valves in a solenoid valve block, according to the preamble of claim 4.
  • the control of a reversing gear is eg in the GB 852,629 disclosed.
  • modular transmission systems are used.
  • the systems consist of at least one main transmission, for example a power shift transmission or an automated manual transmission and a reverse gear.
  • the reversing gear ensures the torque transmission to the drive axle of the wheel sets and is thus arranged after the main transmission in the direction of force flow. Furthermore, the reversing gear can be switched into the three switching positions forward, neutral and reverse.
  • the circuit is operated pneumatically with a three-position switching cylinder. Since it can not always be ensured that the switching pressure is permanently present, each switching position is mechanically locked. For each switching position and for each mechanical interlock, an electrical position signal is present in each case.
  • the shift position is forward directly from neutral to reverse, or from reverse to neutral to forward connected.
  • the circuit of the reversing gear can be brought by hand by unlocking in the neutral position.
  • the spring pressure of a middle position spring brings the shift cylinder in the neutral position.
  • a secondary pump is installed, which supplies the power shift transmission with lubrication when the vehicle is rolling and the engine is stationary and thereby assumes the function of the primary pump.
  • Powershift transmissions for motor vehicles have a primary pump driven by the engine of the motor vehicle, which requires hydraulic oil in a primary circuit in which the hydrodynamic torque converter is located. It is known that the primary pump is arranged on the drive side of the converter and supplies it with hydraulic oil. It is also known, in addition to the primary pump to provide a secondary pump on the transmission output in the power shift transmission. Due to the arrangement on the transmission output, the secondary pump operates independently of the engine of the motor vehicle. Such a secondary pump runs during normal operation of the primary pump in standby, d. h it pumps oil without pressure into a transmission sump. With such a secondary pump, the vehicle can be towed or driven in overrun without the transmission is damaged. In the event that the vehicle towed or driven in overrun, the secondary pump is switched on or controlled in such a way that it can take over the functions of the primary pump as quickly and effectively.
  • the secondary pump increases the complexity of a system as well as the manufacturing cost.
  • a secondary pump needs to be redeveloped to use an existing system for a new application. It would be desirable in such a case to be able to dispense entirely with the secondary pump.
  • the reversing gear is forcibly or automatically switched to its neutral position by the shift cylinder in the event of a compressed air or power failure.
  • the solenoid valves of the solenoid valve block have two positions, a first position in which the solenoid valves pass the compressed air and a second position in which the solenoid valves are vented.
  • a spring is disposed in the solenoid valves such that the spring causes the solenoid valve to the second position.
  • the solenoid valves are open in case of power failure and cause a vent.
  • Two springs causes the shift cylinder such that the first spring positions the shift cylinder in its neutral position and the second spring causes an unlocking of the shift cylinder.
  • the shift cylinder In a controlled by the solenoid valves pressurization of the compressed air, the shift cylinder is controlled from its neutral position to its backward or forward position and locks the shift cylinder in the appropriate position.
  • the solenoid valves When the solenoid valves are vented, the shift cylinder is unlocked by the second spring and its neutral position is positioned by the first spring, with the reverse gear being switched to its neutral position.
  • the inventive method and apparatus of the invention the complexity of the transmission system is reduced and secured a cheaper production of the transmission system, since a waiver of a secondary pump is ensured.
  • Fig. 1 shows a schematic representation of a drive train with a drive motor 1, which is connected to an automated or automatic main transmission 2.
  • the main gear 2 drives via a shaft 3, a reverse gear 4 and an axle 5, the drive wheels 6 at.
  • a control device 7 monitors and controls the reverse gear 4, so that it is adapted to the current driving situation.
  • Fig. 2 shows a schematic representation of the control device 7 according to the invention, with the shift cylinder 9 and the solenoid valve block 10.
  • the shift cylinder 9 has a first and a second pressure chamber 11, 12 on respective side of the piston 14.
  • a first spring 16 is so connected to the piston 14, that the first spring 16 is in a rest position when the piston 14 is in its neutral position N, by compressed air, the piston 14 can be positioned in two additional positions R, V.
  • the piston 14 switches the reversing gear 4 via the connection 8.
  • a second spring 17 claimed as a piston formed locking 15 of the first piston 14th
  • the shift cylinder 9 is controlled via the solenoid valve block 10 by means of compressed air from the compressed air source 18.
  • a first line 19 connects the compressed air source 18 to the solenoid valves A, B, C and a second line 20 connects the solenoid valves A, B, C with a vent.
  • the solenoid valves A, B, C can be controlled in a first position, in which the compressed air source 18 is switched on and in a second position, in which the venting is switched on.
  • the solenoid valves A, B, C are designed such that in a dead state, a venting the pressure chambers 11, 12, 13 is allowed. Therefore, the solenoid valves A, B, C in a power failure, their second position corresponding to the vent occupy.
  • the initial position of the solenoid valves A, B, C is in an unloaded state, in which the piston 14 and the lock 15 is in their positions caused by the springs 16, 17. That is, the first piston 14 is located unlocked in its neutral position N.
  • the solenoid valve B By a connection of the solenoid valve B, the first pressure chamber 11 is connected to the pressure source 18 and thus, the first piston 14 is in the switching position R a.
  • a setting of the switching position V is done by a venting of the first pressure chamber 11 and a connection of the solenoid valve A, wherein the second pressure chamber 12 is connected to the pressure medium source 18.
  • the first spring 16 causes the first piston 14 in the neutral position N with a simultaneous venting of the first and the second pressure chamber 11,12.
  • a locking of the first piston 14 in one of its three switching positions R, N, V is realized by a connection of the solenoid valve C, wherein the pressure chamber 13 is connected to the compressed air source 18.
  • By venting the pressure chamber 13 causes the second spring 17 of the lock 15 in a position in which the switching cylinder 9 is unlocked.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)
  • Gear-Shifting Mechanisms (AREA)

Claims (5)

  1. Procédé de commande d'une transmission réversible commutable (4) d'un véhicule, la transmission réversible (4) étant commutée au moyen d'un cylindre de changement de vitesse (9) dans les trois positions de commutation avant, neutre et arrière et le cylindre de commutation (9) appartenant à un dispositif de commande (7) électropneumatique et électromagnétique, qui comprend en outre au moins deux électrovannes dans un bloc d'électrovannes (10), caractérisé en ce qu'un régime de frein moteur du véhicule est détecté par le dispositif de commande (7) et dans ce cas la transmission réversible (4) est commutée par le cylindre de commutation (9) dans sa position neutre (N).
  2. Procédé de commande selon la revendication 1, caractérisé en ce que dans le cas d'une coupure d'air comprimé ou de tension d'alimentation du dispositif de commande (7), la transmission réversible (4) est commutée par le cylindre de commutation (9) de manière forcée dans la position neutre (N).
  3. Procédé de commande selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que dans le cas d'une coupure d'air comprimé ou de tension d'alimentation du dispositif de commande (7), les électrovannes du bloc d'électrovannes (10) sont ventilées, le cylindre de commutation (9) étant déverrouillé et la transmission réversible (4) étant commutée de manière forcée dans la position neutre (N).
  4. Dispositif de commande (7) d'une transmission réversible commutable (4) d'un véhicule, pour mettre en oeuvre le procédé de commande selon l'une quelconque des revendications précédentes, la transmission réversible (4) pouvant être commutée au moyen d'un cylindre de commutation (9) dans les trois positions de commutation avant, neutre et arrière, et le cylindre de commutation (9) appartenant à un dispositif de commande (7) électropneumatique et électromagnétique, qui comprend en outre au moins deux électrovannes dans un bloc d'électrovannes (10), un premier ressort (16) étant disposé dans le cylindre de commutation de telle sorte que le premier ressort (16) agisse sur le cylindre de commutation dans la direction de sa position neutre, caractérisé en ce qu'un troisième ressort est disposé dans les électrovannes de telle sorte que le troisième ressort provoque une ventilation des électrovannes, de telle sorte que le cylindre de commutation (9) soit déverrouillé par un deuxième ressort (17) et soit positionné par le premier ressort (16) dans sa position neutre et dans ce cas la transmission réversible (4) est déplacée dans sa position neutre.
  5. Dispositif de commande (7) selon la revendication 4, caractérisé en ce qu'un deuxième ressort (17) est disposé dans le cylindre de commutation (9) de telle sorte que le deuxième ressort (17) provoque un déverrouillage du cylindre de commutation (9).
EP20090151292 2008-02-13 2009-01-26 Procédé de commande et dispositif de commande d'un mécanisme d'inversion Not-in-force EP2090809B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008000289A DE102008000289A1 (de) 2008-02-13 2008-02-13 Steuerungsverfahren und Steuerungsvorrichtung eines Wendegetriebes

Publications (3)

Publication Number Publication Date
EP2090809A2 EP2090809A2 (fr) 2009-08-19
EP2090809A3 EP2090809A3 (fr) 2010-01-06
EP2090809B1 true EP2090809B1 (fr) 2011-01-12

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ID=40627369

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Application Number Title Priority Date Filing Date
EP20090151292 Not-in-force EP2090809B1 (fr) 2008-02-13 2009-01-26 Procédé de commande et dispositif de commande d'un mécanisme d'inversion

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EP (1) EP2090809B1 (fr)
DE (2) DE102008000289A1 (fr)
ES (1) ES2356509T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104033595B (zh) * 2014-05-14 2016-08-03 贵州凯星液力传动机械有限公司 一种液压活塞式换向机构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB625416A (en) * 1944-10-24 1949-06-28 Packard Motor Car Co Improvements in and relating to variable-speed transmission mechanism
GB852629A (en) * 1956-02-09 1960-10-26 Voith Gmbh J M Device for change-over of variable drives
DE19612863A1 (de) * 1996-03-30 1997-10-02 Zahnradfabrik Friedrichshafen Getriebesteuerung zur Reduzierung der thermischen Belastung von Schaltelementen eines Wendegetriebes
DE10248828A1 (de) 2002-10-19 2004-04-29 Zf Friedrichshafen Ag Hydraulische Schaltungsanordnung für Automatikgetriebe von Kraftfahrzeugen
DE102006014280A1 (de) * 2006-01-26 2007-08-02 Continental Teves Ag & Co. Ohg Hydraulische Schaltungsanordnung

Also Published As

Publication number Publication date
DE502009000278D1 (de) 2011-02-24
ES2356509T3 (es) 2011-04-08
DE102008000289A1 (de) 2009-08-20
EP2090809A2 (fr) 2009-08-19
EP2090809A3 (fr) 2010-01-06

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